Understanding the Oil Phase in Formulations

When calculating the percentage of the oil phase in a formulation, you generally count ingredients that are primarily soluble or dispersible in oil. Based on the categories you provided, the following would typically be considered part of the oil phase:

• 1. Liquid soluble in oil
• 3. Liquid dispersible in oil
• 5. Powder soluble in oil
• 7. Powder dispersible in oil

Ingredients that are soluble or dispersible in both water and oil (categories 2, 4, 6, and 8) often have properties that bridge both phases, such as emulsifiers or surfactants. While they interact with the oil phase, they are usually not counted solely as "oil" when determining the total oil percentage, as their function is more complex than just being an oily component.

Regarding your question about LipidSoft:

LipidSoft products are emollients and synthetic esters designed to provide slip, spreadability, and a conditioning feel. Although some descriptions might state they "do not contain oil" in the traditional sense (meaning triglycerides), they are functionally used as part of the oil phase in cosmetic formulations because they are soluble in oil and contribute to the overall feel and performance of the oil-based portion of the product. Therefore, LipidSoft should be counted when calculating the total oil percentage of your formula.

Understanding the function and solubility of each ingredient is key to accurately determining the composition of your formulation phases.